Dan's summary:
The App Store compatibility text is incorrect. While it lists macOS 13 as supported, the current shipped version of MIDI Designer Pro X explicitly requires a newer macOS version. Because of this, macOS Ventura blocks the app before it launches and shows a system error. This is an OS-level version check, not a runtime crash and not a hardware issue. If an older build that supports macOS 13 is still available, it may be downloadable from Purchase History. Otherwise, upgrading macOS is required to run the current version.
Also, TestFlight is not possible because we're not building with the older toolchain.
AI 1: Gemini Says
1. Why it won't run
The "Compatibility" text on the App Store page is simply a manual description we entered, which incorrectly lists macOS 13.0. However, the app itself was built using Apple's latest software tools (corresponding to iOS 18.6). This creates a hard technical requirement: the app is asking for specific system frameworks that simply do not exist in macOS Ventura. Your Mac is blocked because its operating system is missing the modern files the app needs to launch.
2. The "Purchased Tab" Workaround
You can often trick the App Store into giving you an older, working version by downloading from your history rather than the product page:
Open the Mac App Store and click your Name/Profile (bottom left).
Click the "iPhone & iPad Apps" filter at the top.
Find MIDI Designer Pro X in the list.
Click the Cloud Download icon (
)—do not click the app icon itself.
A popup should appear offering the "Last Compatible Version." Click Download.
3. Minimum OS Upgrade
If you need to run the latest version of the app, you must upgrade your Mac to macOS 15 (Sequoia). The app is built on the iOS 18 code base, which is natively paired with macOS 15. Anything older (Ventura or Sonoma) will not work.
AI 2: ChatGPT Responds/Corrects
Why MIDI Designer Pro X won’t run on your Mac
Although the App Store page lists macOS 13.0 or later, the currently shipped version of MIDI Designer Pro X requires a newer version of macOS.
Your Mac is running macOS Ventura 13.7.8 on an Apple M1 Max. The hardware is fully supported. The operating system is not.
The app is blocked before it launches because the app bundle declares a minimum macOS version higher than 13. When macOS detects this, it prevents the app from opening and shows the system message “You can’t use this version of the application with this version of macOS.” No app code is executed.
The compatibility text shown on the App Store page is manual metadata and does not reflect the actual minimum macOS version enforced by the app binary. In this case, that text is incorrect.
Downloading an older compatible version
If you previously downloaded MIDI Designer Pro X using the same Apple ID, Apple may allow you to install an older version that supports macOS 13.
Steps:
Open the Mac App Store.
Click your name or profile icon.
Locate MIDI Designer Pro X in your purchase history.
Click the cloud download icon. Do not click the app page.
If available, choose “Download Last Compatible Version.”
This option only appears if Apple still hosts an older build that supports macOS 13.
Running the latest version
To run the current version of MIDI Designer Pro X, you must upgrade macOS to a version that meets the app’s minimum requirement.
Upgrading the OS resolves the issue because it satisfies the version check enforced by the app itself.
